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[原创] NXP MWCT101215W无线充电发送解决方案

1已有 77 次阅读  2017-02-21 11:03   标签blank  解决方案  微软雅黑  target  控制器 
nxp公司的MWCT1012是无线充电完整控制器解决方案,支持大多数Qi 15W单线圈系统;而WCT-15W1COILTX是基于MWCT1012的15W单线圈发送器参考设计,具有最高的效率和具竞争力的材料清单(BOM)成本,输入电压为12V DC,主要用在15W单线圈无线充电,手机充电器,平板电脑,POS终端,手持医疗设备和手机配件如电池盒等.本文介绍了无线充电系统示意图,WCT-15W1COILTX主要特性和优势,框图,电路图和材料清单.

The 15W1COILTX reference design is a 15 watt single-coil transmitter reference design based on the Freescale MWCT1012 wireless charging IC. The Freescale 15 W single-coil transmitter focuses on what the market needs most–highest performance at the lowest cost.

The reference design provides the highest efficiency and active charging area available, whilemaintaining the most competitive electronic bill of materials (BOM) cost.The 15W1COILTX reference design is a unique Freescale design, comprising a 12 V DC inputsource, full-bridge inverter topology, and frequency control methodology and fully compliantwith the latest Wireless Power Consortium (WPC) 15 W specification. Freescale extendssupport to any coil topology which uses a 12 V input source. This reduces the need fordifferent hardware to support multiple (and future) coil types with similar characteristics.

The reference design uses Freescale’s innovative wireless charging transmit controller IC to perform digital demodulation on incoming signals from the receiver. This unique feature provides a major reduction in BOM costs and reduces the PCB footprint.

An additional feature of the solution is a robust foreign object detection (FOD) algorithm. Thisfeature detects metallic objects, such as aluminum or steel objects which may be present inthe charging environment. Freescale foreign object detection algorithms meet and exceed thelatest standards within industry.

The WCT-15W1COILTX reference design isa complete system solution, containing all of the hardware and software componentsnecessary to quickly implement a single-coil charger solution. Special attention has beenplaced on BOM costs in order to deliver a production-ready design. Freescale providesall of the necessary hardware documentation:including schematics, layout and assemblyfiles, as well as a complete BOM. 

A firmwarelibrary is provided which contains all of thenecessary wireless charging control blocks.Access to the library is provided via an APIwhich lets users interact with parameters and settings contained in the firmware,providing maximum control to the engineer.Customers can choose to use a ready-to-usebinary file provided by Freescale or to take a more developmental approach and build anapplication around the firmware library.

WCT-15W1COILTX主要特性和优势:


图1.WCT-15W1COILTX单线圈无线充电器框图

WCT-15W1COILTX目标应用:

• 15 W single-coil wirelesscharging applications
• Mobile phone chargers
• Tablet PCs
• Point-of-sale terminals
• Hand-held medical devices
• Mobile phone accessories suchas battery banks and activephone sleeves

WCT1012 15W 单线圈TX V3.0参考设计系统

This document describes how to use the 15W medium power wireless charger transmitter WCT_15W1COILTX reference board designed by Freescale. The MP Reference solution is compliant with Qi Medium Power 1.2 specification. It is a low-cost reference solution, which can be easily customized through the FreeMASTER GUI tool.


图2.WCT_15W1COILTX 参考板外形图

WCT_15W1COILTX 参考板主要特性:

• Reference design compliant with Qi Medium Power v1.2 specification 
• Integrated digital demodulation in chip 
• Supports multiple types of RX modulation signals (AC capacitor, AC resistor, and DC resistor) 
• Supports two-way communication 
• Supports FOD based on quality factor (Q factor) change 
• Supports FOD based on calibrated power loss accounting 
• Supports Qi MP receiver with 15W output power capability 
• Supports Qi LP receiver with 5W output power capability 
• Super low standby power 
• Supports switch between full bridge topology and half-bridge topology 
• Supports frequency control, phase shift control, and duty control algorithm
• LED for system status indication 
• Input voltage, input current, and coil current sensing 
• Board and coil temperature sensing 
• FreeMASTER GUI tool to enable customization and calibration 
• Supports debug console 

图3.无线充电系统概述

图4.WCT_15W1COILTX 参考板框图

图5.WCT_15W1COILTX 参考板模块位置图

图6.WCT_15W1COILTX 参考板电路图(1)

图7.WCT_15W1COILTX 参考板电路图(2)

图8.WCT_15W1COILTX 参考板电路图(3)

图9.WCT_15W1COILTX 参考板电路图(4)
WCT_15W1COILTX 参考板材料清单见:
WCT_15W1COILTX 参考板材料清单.xls
详情请见:
http://www.nxp.com/assets/documents/data/en/fact-sheets/WCT15W1COILTXFS.pdf
http://www.nxp.com/assets/documents/data/en/user-guides/WCT1012V30SYSUG.pdf
WCT15W1COILTXFS.pdf
WCT1012V30SYSUG.pdf
WCT1012_15W1COILTX_REV3.0_HWDF.zip

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